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Focus on reptiles ： Crawl the page content specified in the page
- 1. Appoint url
-2. Initiate request
-3. Get response data ‘
-4. Data analysis
-5. Persistent storage
Regular expressions ： Match a class of strings with the same rules
Overview of data analysis principle
- The text content of the parsed local part will be stored between tags or in the attributes corresponding to tags
- Label positioning
- Extract the data value stored in the tag or the corresponding attribute （ analysis ）
